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参数资料
| 型号： | XR17V358IB-0A-EVB |
| 厂商： | Exar Corporation |
| 文件页数： | 35/68页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR XR17V358 |
| 产品培训模块： | PCIe UARTs UART Product Overview |
| 标准包装： | 1 |
| 主要目的： | 接口，UART |
| 嵌入式： | 否 |
| 已用 IC / 零件： | XR17V358 |
| 已供物品： | 板 |
| 相关产品： | 1016-1294-ND - IC UART PCIE OCTAL 176FPBGA |
| 其它名称： | 1016-1293 |
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XR17V358
40
HIGH PERFORMANCE OCTAL PCI EXPRESS UART
REV. 1.0.4
3.3
Infrared Mode
Each UART in the V358 includes the infrared encoder and decoder compatible to the IrDA (Infrared Data
Association) version 1.1. The input pin ENIR conveniently activates all 8 UART channels to start up in the
infrared mode. This global control pin enables the MCR bit [6] function in every UART channel register. After
power up or a reset, the software can overwrite MCR bit [6] if so desired. ENIR and MCR bit [6] also disable its
receiver while the transmitter is sending data. This prevents the echoed data from going to the receiver. The
global activation ENIR pin prevents the infrared emitter from turning on and drawing large amount of current
while the system is starting up. When the infrared feature is enabled, the transmit data outputs, TX[7:0], would
idle LOW. Likewise, the RX [7:0] inputs assume a LOW idle level.
The infrared encoder sends out a 3/16 of a bit wide pulse for each “0” bit in the transmit data stream. This
signal encoding reduces the on-time of the infrared LED, hence reduces the power consumption. See
Figure 11 below. Typical max data rate for the infrared encoder with a 3/16 of a bit wide pulse is 115.2 kbps.
For data rates above 115.2 kbps and up to1.152 Mbps, Fast IR mode can be enabled via DLD bit-4 for a 1/4 of
bit wide pulse. For exact 3/16 or 1/4 of a bit wide pulse, the 16X sampling rate should be used and DLD[3:0] =
’0000’. The IR pulse width can vary if DLD[3:0] is not ’0000’.
The infrared decoder receives the input pulse from the infrared sensing diode on RX pin. Each time the
decoder senses a light pulse, it returns a "0" to the data bit stream. The RX input signal may be inverted prior
delivered to the input of the decoder via internal register setting. This option supports active LOW instead of
normal active HIGH pulse from some infrared modules on the market.
FIGURE 11. INFRARED TRANSMIT DATA ENCODING AND RECEIVE DATA DECODING
Character
Data Bits
Sta
rt
Stop
00
0
11
1
11
TX Data
Transmit
IR Pulse
(TX Pin)
Bit Time
1/2 Bit Time
3/16 or 1/4
Bit Time
IrEncoder-1
Character
Data Bits
Start
Stop
00
0
11
1
Bit Time
1/16 Clock Delay
IRdecoder-1
RX Data
Receive
IR Pulse
(RX pin)
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相关代理商/技术参数 |
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| XR17V358IB176-F | 功能描述:UART 接口集成电路 8 Channel PCIe UART w/256 Byte FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| XR17V358IB176-F | 制造商:Exar Corporation 功能描述:IC OCTAL UART 25MBPS 3.6V 176-BGA |
| XR17V358IB-E4-EVB | 功能描述:界面开发工具 Eval Board for XR17V358IB-E4 RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| XR17V358IB-E8-EVB | 功能描述:界面开发工具 Eval Board for XR17V358IB-E8 RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| XR1857SN | 制造商:Electro-Term/Hollingsworth 功能描述: |
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